emperors in Ming and Qing dynasties generally read Zi Zhi Tong Jian when they came of age. The emperors in Qing dynasty were enlightened by Manchu and Chinese. The Manchu people were relatively shallow, that is, they could read words. Sinology generally required reading four books and five classics. Emperors in the Qing Dynasty were generally well educated. Kangxi dabbled in a wide range of religions, military affairs, science and technology, mathematics, etc., and typical ones included Diamond Sutra, Laozi, Sun Tzu's Art of War, Qi Min Yao Shu, Historical Records, Complete Tang Poetry, Lun Heng, etc. Yongzheng advocated legalism and believed in Buddhism, and his books were pragmatic, while Xunzi and Han Fei were all his books. It is not easy to be an emperor.